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-rw-r--r--lib/mnesia/src/mnesia_controller.erl40
1 files changed, 2 insertions, 38 deletions
diff --git a/lib/mnesia/src/mnesia_controller.erl b/lib/mnesia/src/mnesia_controller.erl
index 1d3bd55b48..836510a80d 100644
--- a/lib/mnesia/src/mnesia_controller.erl
+++ b/lib/mnesia/src/mnesia_controller.erl
@@ -279,50 +279,14 @@ rec_tabs([], _, _, Init) ->
unlink(Init),
ok.
-%% New function that does exactly what get_cstructs() used to do.
-%% When this function is called, we know that the calling node knows
-%% how to convert cstructs on the receiving end (should they differ).
get_remote_cstructs() ->
- call(get_cstructs).
+ get_cstructs(). %% Sigh not forward compatible always check version
%% Old function kept for backwards compatibility; converts cstructs before sending.
get_cstructs() ->
{cstructs, Cstructs, Running} = call(get_cstructs),
Node = node(group_leader()),
- {cstructs, normalize_cstructs(Cstructs, Node), Running}.
-
-normalize_cstructs(Cstructs, Node) ->
- %% backward-compatibility hack; normalize before returning
- case rpc:call(Node, mnesia_lib, val, [{schema,cstruct}]) of
- {badrpc, _} ->
- %% assume it's not a schema merge
- Cstructs;
- #cstruct{} ->
- %% same format
- Cstructs;
- Cstruct ->
- %% some other format
- RemoteFields = [F || {F,_} <- rpc:call(Node, mnesia_schema, cs2list, [Cstruct])],
- [convert_cs(Cs, RemoteFields) || Cs <- Cstructs]
- end.
-
-convert_cs(Cs, Fields) ->
- MyFields = record_info(fields, cstruct),
- convert(tl(tuple_to_list(Cs)), MyFields, Fields, []).
-
-convert([H|T], [F|FsL], [F|FsR], Acc) ->
- convert(T, FsL, FsR, [H|Acc]);
-convert([H|T], [Fl|FsL] = L, [Fr|FsR] = R, Acc) ->
- case {lists:member(Fl, FsR), lists:member(Fr, FsL)} of
- {true, false} ->
- convert(T, L, FsR, [H|Acc]);
- {false, true} ->
- %% Field Fl doesn't exist on receiver side; skip.
- convert(T, FsL, R, Acc)
- end;
-convert([], _, _, Acc) ->
- list_to_tuple([cstruct|lists:reverse(Acc)]).
-
+ {cstructs, mnesia_schema:normalize_cs(Cstructs, Node), Running}.
update(Fun) ->
call({update,Fun}).